George s



e. s. BOSWORTH.

Cooking Stove.- 4

Patented June 8,1869.-

W/TIYEJJE'S dained slam GEORGE S. BOSWORTH, OF TROY, NEW YORK.

Letters Patent No. 91,076, dated June 8, 1869.

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The schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern:

Be it known that I, Gnonen S. Boswon'rrr, of Troy, in the county ofRensselaer, and State of New York, have invented certain new and usefulImprovements in Cooking-Stoves; and I do hereby declare the following tobe a full, clear, and exact description thereof, reference being bad tothe accompanying drawings of the same, making specification, and inwhich- Figure 1 represents a-view in perspective of a stove embracing myimprovements;

Figure 2 represents a vertical longitudinal section of the same; and VFigure 3-represents a horizontal section of the firebox, showing thechamber which surrounds it.

In the accompanying drawings the stove is represented asbeing'constructed with the ordinary rectangular oven, A, and a frontelevated fire-box or chamber, B.

The oven is provided, at its top,.with the usual l1ot-air:chamber, G;and the fire-box or chamber B is surrounded by an air-heating chamber,E, extendingfrom the top plate-of the. stove to beneath the grate Fr Iam aware that an air-heating chamber surrounding the fire-box is notnew, and that a diving-flue has been arranged between the front plate ofthe stove and the front side of the fire-box, communicating with theash-pit or chamber directly under the grate; but in such an arrangementof a front diving-flue, the air is only moderately heated, for it isnotpassed in contact with the ends and rear side of the fire-box;neither is it conducted around'to the rear-side of the grate, ad-'jacent tothe'oven,

The air-heating chamber E, which surrounds the grate, is provided with adischarge-opening, E, lo-

cated between the front plate, G, and the rear, side,

H, of the fire-box, and directly beneath the grate, as

shown in fig. 2 of the drawings.

The discharge-openiugof this chamber extends the whole length of thegrate, while the receivingopenings I are located infront of the stove,and provided with a damper, J by which the admission of air may beregulated'or entirely out 01f.

The air-heating chamber E, thus arranged, has a front receiving and arear discharging-opening. The air, therefore, must pass in contact withthe four sides of the tire-box, and through the four sides of thechamber 1E, before it is discharged beneath the grate, thereby heatingthe front ovenrplate from top to bottom, and supplying highly-heated airdirectly beneath the grate.

The rear discharging-branch of this air-heating chamber communicateswith the horizontal flue O, at the top of the oven.

part of this The ash-pan L fits closely into the ash-pit, so that whenit is closed, the cold air is entirely excluded from beneath the grate.

The only draught, therefore, beneath the grate, is furnished through theair-heating chamber, and is received through the dampered openings I, atthe front of the stove. 1

I have found, by experience, that the discharge of highly-heated airbeneath the grate serves much better, in promoting both combustion andthe draught, than the introduction of cold air directly in front,through the ash-pit, or directly and entirely from the front above thegrate.

' While the chamber E, however, thus furnishes the draught beneath thegrate, it also furnishes air direc-tly into the chamber of combustion,through a seriesof perforations, a, in the upper ridge of thechamber,-extending entirely around the fire-box.

' These perforations, however, are not, of themselves, new; but whenused iu-connectionwith a chamber, having a discharge-opeuingE, beneaththe grate, they are,'to"this extent, new, for the purpose of dividingthe draught alike above and bcneaththe grate.

Moreover, a very important advantage is gained in the division of theonly and direct draught, in making that through the perforations abovethe grate secondary, as to the quantity of air discharged, to the -maindraught, beneath the grate, for the latter requires more' than theformer, and the flue, therefore, which supplies the grate with air,extends the whole" width of the stove, and empties directly beneath thegrate, thereby reversing the practice heretofore, of supplying the grateentirely and directly from the front of the stove. 1C

The top and bottom fiues, O D, of the oven, communicate with the frontand rear flues, E and M, thereof, and the top "draught-flue, N, and thebottom draught-flue, P, communicate with the rear flue,Q, leading to thestove-pipe in the rear.

The top oven-plate may be provided with openings, It, for the purpose ofequalizing the heat of the oven; and the stove may be fittedwith theusual damper, S, at. the smoke-pipe, to divert the draught in rear andbeneath the oven, through the rear and bottomfiues, M, D, P, andQ whenrequired.

In all other respects, the stove maybe constructed and finished inthemostimproved manner.

The arrows indicate the direction of ,the draught through the chambersand, the several flues of the stove.

Having thus described my improvement,

I claim 1. The diving-flue E of the air-heating chamber, having itsreceiving-opening I in front, and. its discharge-opening E beneath therear side of the grate, and communicating with the ash-pit,substantially as described.

2. The air-heating chamber E, having perforations a above the chamber Bof combustion, and a discharge-opening, E, of greater discharging-area,beneath the grate, substantially as described.

3. The air-heating chamber E, communicating with the chambers above andbeneath the grate, and with the hot-air flue 0, above the oven, in themanner herein described.

4. The air-heating chamber E, havinga front receiving-opening, I, abovethe grate, and a rear discharging-opening, E, beneath the grate,incombination with the single damper, J, for regulating the admission ofair above and beneath the grate, as described.

GEORGE S. BOSWORTH.

Witnesses:

JAMES E. BRIGGS, Ansmm F. PARK.

